Department of Radiology, Kocaeli University, Kocaeli, Turkey.
Department of Radiology, Ankara Golbasi Sehit Ahmet Ozsoy State Hospital, Ankara, Turkey.
J Med Imaging Radiat Sci. 2020 Mar;51(1):137-144. doi: 10.1016/j.jmir.2019.12.003. Epub 2020 Jan 30.
Computed tomography (CT) measurements of hepatic steatosis can be performed using unenhanced CT images. The purpose of this study was to assess the occurrence of hepatic steatosis using unenhanced CT images for patients undergoing cholecystectomy or having cholelithiasis.
A total of 143 unenhanced CT cases from a single centre were retrospectively examined. The CT number of liver, ratio of CT number of liver to spleen, and CT number of liver minus CT number of spleen were measured in three groups: (1) patients undergoing cholecystectomy, (2) patients having cholelithiasis, and (3) control group. Abdominal circumference, anterior subcutaneous fat tissue thickness, and body mass index were obtained.
Mean CT number of liver was significantly different between the group of patients with cholecystectomy and cholelithiasis and the control group (P < .001) and also between cases of cholecystectomy and cholelithiasis (P = .041), with the lowest CT number of liver in the cholecystectomy group. The mean CT number of liver minus CT number of spleen and mean CT number (liver/spleen) ratios, evaluated separately for both lobes, were not different comparing the cholelithiasis and cholecystectomy groups. The mean CT number of liver minus CT number of spleen and mean CT number (liver/spleen) ratios differed significantly between the control group and both patient groups (P < .001). Positive correlations were identified between abdominal circumference, subcutaneous fat depth, body mass index, and liver size and hepatic steatosis.
There was an increased occurrence of hepatic steatosis in patients who have undergone a cholecystectomy compared with patients treated for cholelithiasis and the control group.
通过非增强 CT 图像可以对肝脂肪变性进行 CT 测量。本研究旨在评估接受胆囊切除术或患有胆石症患者的非增强 CT 图像中肝脂肪变性的发生情况。
回顾性检查了来自单个中心的 143 例非增强 CT 病例。在三组中测量了肝的 CT 数、肝与脾的 CT 数之比以及肝的 CT 数减去脾的 CT 数：（1）行胆囊切除术的患者，（2）患有胆石症的患者，和（3）对照组。测量了腹围、前皮下脂肪组织厚度和体重指数。
胆囊切除术组和胆石症组与对照组之间的平均肝 CT 数有显著差异（P <.001），胆囊切除术组和胆石症组之间也有显著差异（P =.041），胆囊切除术组的肝 CT 数最低。分别评估两个叶的肝 CT 数减去脾 CT 数的平均值和肝 CT 数（肝/脾）比值无差异。与两组患者相比，对照组的肝 CT 数减去脾 CT 数的平均值和肝 CT 数（肝/脾）比值差异有统计学意义（P <.001）。肝大小和肝脂肪变性与腹围、皮下脂肪深度、体重指数呈正相关。
与接受胆石症治疗的患者相比，接受胆囊切除术的患者肝脂肪变性的发生率增加。
